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The Earpiece shown in the second picture is definitely not a Crystal type (the first pix is OK however).
The 2nd pix shows a normal low-impedance magnetic earpiece of the type which were supplied in the millions with cheap transistor radios..
FWIW, here is a pix of a genuine Crystal earpiece http://www.jaycar.com.au/ShowLargephoto.asp?id=177&IMAGE=
Gutta Percha ( talk)